CN102954971B - Thermal power plant coal quality online monitoring system based on nature gamma spectrum analysis, and method thereof - Google Patents
Thermal power plant coal quality online monitoring system based on nature gamma spectrum analysis, and method thereof Download PDFInfo
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- CN102954971B CN102954971B CN201210437644.8A CN201210437644A CN102954971B CN 102954971 B CN102954971 B CN 102954971B CN 201210437644 A CN201210437644 A CN 201210437644A CN 102954971 B CN102954971 B CN 102954971B
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Abstract
The invention relates to a thermal power plant coal quality online monitoring system based on nature gamma spectrum analysis and a method thereof. The system comprises a nature gamma energy spectrum measurement system and a coal quality recognition system, wherein the nature gamma energy spectrum measurement system comprises a nature gamma measurement probe, a signal amplifier, a spectrum stabilization control system connected with the signal amplifier, and an electric pulse analysis system, and the spectrum stabilization control system and the electric pulse analysis system are connected through a data interface and the coal quality recognition system. The monitoring method comprises: real-timely measuring a nature gamma radiation characteristic of coal, recognizing types and components of the coal entering a furnace according to coal quality and a nature gamma radiation characteristic sample library, and calculating a coal quality parameter. With the present invention, online monitoring on coal quality of the thermal power plant can be quickly, accurately and continuously performed, and real-time monitoring requirements on the coal quality parameter by an automatic control system under a certain condition can be met, wherein the condition comprise that coal quality change is significant and blended coal combustion is performed in thermal power plants in our country.
Description
Technical field
The present invention relates to coal-fired thermal power generation observation and control technology field, be specifically related to a kind of fired power generating unit as-fired coal matter on-line monitoring system and method.
Background technology
Due to the marketization that generating is coal-fired, the coal supply of power plant is difficult to guarantee and uses design coal always, the supply coal of most thermal power plant is of a great variety, ature of coal fluctuation is larger, the phenomenon of ubiquity coal mixing combustion, this brings great difficulty to the automatic control of genset, and especially overcritical for the modern times and the high-power unit of ultra supercritical, the instability of ature of coal seriously constrains the performance of unit allocation and adjustment.Carrying out real-time on-line monitoring to the ature of coal entering stove burning, is an urgent demand that boiler combustion adjustment and unit cooperative control.
At present, ature of coal on-line monitoring technique is mainly divided into five large classes, and for existing domestic and international Patents, major technique adopts X ray, gamma-rays, light analysis, indirect calculation and sampling combustion analysis method respectively.Wherein higher what be most widely used is based on X ray and gamma-ray analytical approach to precision, these two class methods all adopt radioactive source to send radiant rays and analyze coal sample, harmful, therefore generally all analyze in the mode of sampling in closed container, online continuous monitoring can not be realized.Also there is same problem in sampling burning and most of light analytical approach, this is also the Main Bottleneck of current ature of coal on-line continuous monitoring technology.
Nature γ radiation is different with X-radiation from active γ radiation, refer to the radiant rays that the inner primary denier radioelement of natural minerals sends, extensively exist in natural rock, earth, also natural gamma radiation is claimed, it is a part for physical environment background radiation, therefore, based on the not additional any hazardous radiation of the equipment detecting nature γ radiotechnology, harmless.
Natural Gamma ray, from natural radioactive element, mainly comprises uranium series, actinium series, thorides and K40 (potassium), Rb87 (rubidium) etc.Generally all contain the radioelement of varying number in rock and clay, and constantly release gamma-rays.The energy of γ ray that different elements is released is different, K40 can only send the gamma-rays of 1.46MeV, thorium family major part gamma-rays is distributed in below 1.3MeV, obvious peak value is had at 2.62MeV place, uranium series has the gamma-rays of various energy, major part is all distributed in below 1.3MeV, has obvious peak value at 1.76MeV place.
In stratum radioelement content number, be by the parent rock containing radioelement, through long-term geologic function, be constantly separated and redistribution and being formed.It is relevant with type, sedimentary environment, handling process, diagenesis epigenesis, rate of decay etc. the factor of rock, like this, we just by measuring the relative content of various radioelement in rock, and can release above-mentioned each factor, thus are applied to the exploratory development in oil field and colliery.
The gamma-ray logging of oil and the industrial extensive employing of Coal Exploration, general employing three window method, namely the gamma intensity of 1.46MeV, 1.76MeV and 2.62MeV characteristic energy is caught, solve the ratio of K40, uranium series and thorides content, thus for finding petroliferous rock stratum or determining the position in coal seam.
In addition, because not containing radioelement in fixed carbon in coal and volatile matter, therefore for the coal of same ash content composition, natural γ radiation intensity is proportional to the content of ash content in coal, and its linear criterion difference can reach 0.6-1.3%.This is used to pit ash instrument, by the correction in advance to colliery sample, adopts the Ash analyser of this principle to measure nature γ radiation intensity to detect pit ash on coal in dump, train or automobile bodies and travelling belt.But the measurement of this ash content is only confined to the coal in same coal seam or same colliery, and there is coal varitation significantly and the situation of a large amount of coal mixing combustion in the coal of at present China power station burning, therefore, the Ash analyser of this technology is adopted cannot to be directly used in the on-line monitoring of power station ature of coal.
Above information shows, existing gamma-rays coal quality monitoring technology is in closed container, adopt the gamma-rays that sends of radioactive source to irradiate coal sample, carries out the monitoring of ature of coal according to the gamma-emitting different qualities of ingredient draws each in coal; Existing natural γ radiation detection is used for being that the γ radiation intensity of employing three kinds of characteristic frequencies easy to identify is used for the lithology on auxiliary judgment stratum in the exploration of coal and oil, assist according to the change of radiation intensity and find coal seam and oil reservoir, it is the one in many well loggings, be not used alone, geologic prospecting need be carried out in conjunction with other type (sound, electricity etc.) well logging by the method for manual analysis; The existing natural γ radiation detection being applied to raw coal is used for carrying out the estimation of the single coal ash content that colliery produces by the natural γ radiation intensity detecting coal, only effective to the single coal preset, and cannot obtain other ature of coal parameter.
Summary of the invention
In order to solve existing ature of coal on-line monitoring technique Problems existing, the object of the present invention is to provide a kind of thermal power plant's ature of coal on-line monitoring system based on natural gamma analysis of spectrum and method, can fast, accurately, continuous print carries out on-line monitoring to the ature of coal of thermal power plant, meet the general coal varitation of current China thermoelectricity significantly and under coal mixing combustion condition automatic control system to the Real-Time Monitoring requirement of ature of coal parameter.
To achieve these goals, the present invention is by the following technical solutions:
Based on thermal power plant's ature of coal on-line monitoring system of natural gamma analysis of spectrum, comprise naturalγ-rayenergyspectrum measuring system and coal quality identification system 10;
Described naturalγ-rayenergyspectrum measuring system, comprise the anti-cosmic radiation interferometry district of lead metal floor 3 formation being wrapped in certain length on coal-fired power plant transfer passage, the naturalγ-rayenergyspectrum measuring sonde 4 of the collection nature γ radiation ray installed in radiation proof interferometry district, the signal amplifier 5 be connected with naturalγ-rayenergyspectrum measuring sonde 4, spectrum stabilization control system 6 and electric pulse analytic system 7;
The input end of described spectrum stabilization control system 6 is connected with naturalγ-rayenergyspectrum measuring sonde 4, output terminal is connected with coal quality identification system 10 by data-interface 8, built-in temperature correction curve is adopted to carry out coarse adjustment to the amplification coefficient of naturalγ-rayenergyspectrum measuring sonde 4, and carry out fine tuning according to typical radioactive element characteristic energy, ensure the output accuracy of nature γ measuring sonde 4;
The input end of described electric pulse analytic system 7 is connected with signal amplifier 5, and output terminal is connected with coal quality identification system 10 by data-interface 8, the electric impulse signal transmitted by signal amplifier, divides multiple energy window to carry out step-by-step counting according to pulse height;
The input end of described coal quality identification system 10 is connected with spectrum stabilization control system 6 and electric pulse analytic system 7 respectively by data-interface 8, output terminal is connected with the control system of power plant, according to each energy window counted number of pulses of electric pulse analytic system 7, obtain the proper vector of the natural γ radiation spectrum of target coal dust, carry out the identification of the coal component of as-fired coal based on the principle minimizing nature γ radiation spectral characteristics vector deviation in each typical ature of coal nature γ radiation spectral characteristics vector storehouse demarcated in advance, and adopt the computing method of following formula (1) to calculate the thermal value of as-fired coal according to the ature of coal parameter of each typical coal, volatile matter, ash content and moisture.
M in formula
objthe thermal value of the as-fired coal required by expression, volatile matter, ash content or water parameters; M
irepresent the thermal value of i-th component corresponding with required parameter, volatile matter, ash content or water parameters; α
irepresent the identification mass percent shared by the i-th component out; N is the typical coal quantity of the tested coal of identification composition out.
Described naturalγ-rayenergyspectrum measuring sonde 4 is made up of low potassium NaI crystal and photomultiplier, is installed on the transfer passage sidewall of coal dust.
The monitoring method of the thermal power plant's ature of coal on-line monitoring system based on natural gamma analysis of spectrum described above, by measure in real time coal natural γ radiation feature and according to ature of coal and natural γ radiation feature Sample Storehouse, identification as-fired coal kind and component thereof, calculate ature of coal parameter.
Described natural γ radiation feature by measuring in real time coal according to ature of coal and natural γ radiation feature Sample Storehouse, identification as-fired coal kind and component thereof, the concrete grammar calculating ature of coal parameter is: first, the naturalγ-rayenergyspectrum measuring sonde 4 that the part natural Gamma ray that in the coal 2 of conveying in coal-fired transfer passage 1, contained by ash content, radioelement is constantly released is installed on channel side wall absorbs, and is converted to electric signal and delivers to signal amplifier 5 and amplify rear output and can deliver to electric pulse analytic system 7 for the electric impulse signal of pulse analysis, meanwhile, spectrum stabilization control system 6 is by being installed on the temperature sensor of naturalγ-rayenergyspectrum measuring sonde 4 inside, obtain temperature signal, the temperature correction curve built-in according to spectrum stabilization control system 6 carries out coarse adjustment to the amplification coefficient of naturalγ-rayenergyspectrum measuring sonde 4, and carry out fine tuning according to typical radioactive element characteristic energy, ensure the output accuracy of naturalγ-rayenergyspectrum measuring sonde 4, subsequently, electric pulse analytic system 7 is according to the multiple energy windows arranged, the pulse of the corresponding energy received is counted, and carry out the preservation of count results with the Δ t time for the cycle and pass to coal quality identification system 10, subsequently, coal quality identification system 10 with the Δ t time for the cycle, the count results of each energy window in n Δ t time before statistics current time, generate and measure ature of coal nature γ radiation feature coding, the feature coding of INTELLIGENT IDENTIFICATION algorithm to known coal of coal quality identification system 10 inside combines, and compare with actual measurement feature coding, until minimize nature γ radiation spectral characteristics vector output bias, identification draws the mixing proportion α of each typical coal
i, accordingly with reference to the thermal value of each coal sample, volatile matter, ash content and moisture, calculate the mixing thermal value of tested fire coal, volatile matter, ash content and moisture according to formula (1), the control system of electric power supply plant uses.
The core measuring method that the present invention is based on thermal power plant's ature of coal on-line monitoring system of natural gamma analysis of spectrum mainly has the geologic function such as very similar diagenesis, sedimentary environment, handling process and rate of decay geographically based on the coal-fired ore bed environment from same mineral resources or same mining area, and therefore the proportion of composing of natural radioactive element contained by it is very similar.This kind of natural radioactive element is not contained in coal-fired fixed carbon and volatile matter, but the radioactive composition of ash content then containing this proportion of composing in fire coal.The natural γ radiation characteristic of the corresponding coal-fired ash content of different geological characteristics shows as the difference of radiant energy distribution in nature γ radiation spectrum, and this is used to the coal identifying separate sources.Due to the coal-fired ubiquity blending of power plant's supply and the situation of coal mixing combustion, ature of coal on-line monitoring method of the present invention is by setting up the ature of coal parameter Sample Storehouse of burning coal nature γ radiation frequency spectrum feature and correspondence thereof, radiant energy distribution error minimize in mixed coal nature γ radiation spectrum is adopted to be target, picked out the blending components of each known coal by parameter identification method, thus calculate actual as-fired coal matter parameter according to the ature of coal parameter of Sample Storehouse.
Compared with prior art, measuring method of the present invention adopts based on employing coal nature γ radiation spectrum characteristic identification as-fired coal kind and blending components thereof, thus realizes the on-line monitoring for as-fired coal matter parameter.Data analysis adopts the method for statistics of sliding, and adopts n Δ t time as the count cycle of statistics, but every Δ t time and exportable result of calculation, while raising analysis precision, also improves response speed.This system hardware is not containing any radioactive source, to human body and environmental nonpollution, can be installed on existing coal-fired transport path (outlet of feeder travelling belt, coal pulverizer, tube cell etc.), analyze the ature of coal parameter that the coal burning caloricity, ash content, volatile matter, moisture etc. of feeding boiler combustion are important in real time incessantly, the automatic control of power plant's steady load is had great importance.
Accompanying drawing explanation
Fig. 1 is the composition structural drawing of the thermal power plant's ature of coal on-line monitoring system that the present invention is based on natural gamma analysis of spectrum and parameter identification technique.
Fig. 2 is the FB(flow block) of the thermal power plant's ature of coal on-line monitoring method that the present invention is based on natural gamma analysis of spectrum and parameter identification technique.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be described in more detail.
As shown in Figure 1, a kind of thermal power plant's ature of coal on-line monitoring system based on natural gamma analysis of spectrum of the present invention, comprise naturalγ-rayenergyspectrum measuring system, the spectrum stabilization control system 6 be connected with naturalγ-rayenergyspectrum measuring system and electric pulse analytic system 7, described spectrum stabilization control system 6 is connected with coal quality identification system 10 by data-interface 8 with electric pulse analytic system 7, wherein: spectrum stabilization control system 6, carry out two-way communication by telecommunication cable 9 and data-interface 8 between pulse analysis system 7 and coal quality identification system 10, described naturalγ-rayenergyspectrum measuring system comprises the radiation proof interferometry district of lead metal floor 3 formation being wrapped in certain length on thermal power plant's coal dust transfer passage 1, the naturalγ-rayenergyspectrum measuring sonde 4 of the collection nature γ radiation ray installed in radiation proof interferometry district, naturalγ-rayenergyspectrum measuring sonde 4 is made up of low potassium NaI crystal and photomultiplier, be installed on the transfer passage sidewall of coal dust, the signal amplifier 5 be connected with naturalγ-rayenergyspectrum measuring sonde 4, the input end of described spectrum stabilization control system 6 is connected with naturalγ-rayenergyspectrum measuring sonde 4, output terminal is connected with coal quality identification system 10 by data-interface 8, it is serious that amplification coefficient due to photomultiplier varies with temperature drift, spectrum stabilization control system 6 utilizes the high voltage of photomultiplier to regulate real-time spectrum stabilization to control, control the amplification coefficient of photomultiplier, this control system does not use the radioactive reference source usually adopted, but adopt the temperature correction curve of photoelectric tube amplification coefficient to implement coarse adjustment, to avoid radioactive contamination and danger, the working temperature of photomultiplier measured in real time by the temperature sensor being configured in photomultiplier place, due to thermoelectricity ature of coal measurement environment temperature variation slowly, and variation range is narrower, therefore the control accuracy requirement of coarse adjustment is possessed based on the temperature drift curve demarcated in advance, it accurately controls to carry out accurate adjustment in conjunction with the characteristic energy peak value of radioelement in tested coal dust, the input end of described electric pulse analytic system 7 is connected with signal amplifier 5, and output terminal is connected with coal quality identification system 10 by data-interface 8, the electric impulse signal transmitted by signal amplifier, divides multiple energy window to carry out step-by-step counting according to pulse height, the input end of described coal quality identification system 10 is connected with spectrum stabilization control system 6 and electric pulse analytic system 7 respectively by data-interface 8, output terminal is connected with the control system of power plant, coal quality identification system 10 accepts Data Concurrent by telecommunication cable 9 and send steering order, according to each energy window counted number of pulses of electric pulse analytic system 7, obtain the natural γ radiation feature vector of target coal dust, the identification of target coal dust component is carried out according to the typical Coal Characteristics Vector Groups preset, determine the component of each coal, and in each typical ature of coal nature γ radiation spectral characteristics vector storehouse demarcated in advance, the identification of the coal component of as-fired coal is carried out based on the principle minimizing nature γ radiation spectral characteristics vector deviation, and the thermal value of as-fired coal is calculated according to the ature of coal parameter of each typical coal, volatile matter, ash content and moisture.
As depicted in figs. 1 and 2, the monitoring method of a kind of thermal power plant's ature of coal on-line monitoring system based on natural gamma analysis of spectrum of the present invention, first, the naturalγ-rayenergyspectrum measuring sonde 4 that the part gamma-rays that in the coal 2 of conveying in coal dust transfer passage 1, contained by ash content, radioelement is constantly released is installed on channel side wall absorbs, and is converted to electric signal and delivers to signal amplifier 5 and amplify rear output and can deliver to electric pulse analytic system 7 for the electric impulse signal of pulse analysis, meanwhile, spectrum stabilization control system 6 is by being installed on the temperature sensor of naturalγ-rayenergyspectrum measuring sonde 4 inside, obtain temperature signal, the temperature correction curve built-in according to spectrum stabilization control system 6 carries out coarse adjustment to the amplification coefficient of naturalγ-rayenergyspectrum measuring sonde 4, and carry out fine tuning according to typical radioactive element characteristic energy, ensure the output accuracy of naturalγ-rayenergyspectrum measuring sonde 4, subsequently, electric pulse analytic system 7 is according to the multiple energy windows arranged, the pulse of the corresponding energy received is counted, and carry out the preservation of count results with the Δ t time for the cycle and pass to coal quality identification system 10, subsequently, coal quality identification system 10 with the Δ t time for the cycle, the count results of each energy window in n Δ t time before statistics current time, generate and measure ature of coal nature γ radiation feature coding, the feature coding of INTELLIGENT IDENTIFICATION algorithm to known coal of coal quality identification system 10 inside combines, and compare with actual measurement feature coding, until minimize nature γ radiation spectral characteristics vector output bias, identification draws the mixing proportion α of each typical coal
i, accordingly with reference to the thermal value of each coal sample, volatile matter, ash content and moisture, calculate the mixing thermal value of tested fire coal, volatile matter, ash content and moisture according to formula (1), the control system of electric power supply plant uses.
The energy window Wi of specific implementation method by arranging more than three in pulse analysis system 7 of present system, (i>3), and the counting in length Δ t preset time is carried out to the electric pulse falling into each energy window Wi, count results with the Δ t time for the cycle sends into coal quality identification system.Identification system slip is chosen the natural γ radiation spectrum distribution character of the count results in continuous n Δ t time to tested fire coal and is carried out feature coding, by combining by the feature coding of Identification of parameter to known coal, and compare with actual measurement feature coding, until minimize output error, identification draws the mixing proportion of each known coal, and the thermal value accordingly with reference to each coal sample calculates the mixing thermal value of tested fire coal and other ature of coal parameter with grey ature of coal parameter of grading.Because time count cycle Δ t is longer, the measuring accuracy of count results reflection is higher, but is also strengthened measuring period.
Claims (4)
1. based on thermal power plant's ature of coal on-line monitoring system of natural gamma analysis of spectrum, it is characterized in that: comprise naturalγ-rayenergyspectrum measuring system and coal quality identification system (10);
Described naturalγ-rayenergyspectrum measuring system, comprise be wrapped in thermal power plant's coal dust transfer passage on the radiation proof interferometry district that formed of the lead metal floor (3) of certain length, the naturalγ-rayenergyspectrum measuring sonde (4) of the collection nature γ radiation ray installed in radiation proof interferometry district, the signal amplifier (5) be connected with naturalγ-rayenergyspectrum measuring sonde (4), spectrum stabilization control system (6) and electric pulse analytic system (7);
The input end of described spectrum stabilization control system (6) is connected with naturalγ-rayenergyspectrum measuring sonde (4), output terminal is connected with coal quality identification system (10) by data-interface (8), the amplification coefficient of built-in temperature correction curve to naturalγ-rayenergyspectrum measuring sonde (4) is adopted to carry out coarse adjustment, and carry out fine tuning according to typical radioactive element characteristic energy, ensure the output accuracy of nature γ measuring sonde (4);
The input end of described electric pulse analytic system (7) is connected with signal amplifier (5), output terminal is connected with coal quality identification system (10) by data-interface (8), the electric impulse signal transmitted by signal amplifier, divides multiple energy window to carry out step-by-step counting according to pulse height;
The input end of described coal quality identification system (10) is connected with spectrum stabilization control system (6) and electric pulse analytic system (7) respectively by data-interface (8), output terminal is connected with the control system of power plant, electric pulse analytic system (7) is according to the multiple energy windows arranged, the pulse of the corresponding energy received is counted, and carry out the preservation of count results with the Δ t time for the cycle and pass to coal quality identification system (10), subsequently, coal quality identification system (10) with the Δ t time for the cycle, the count results of each energy window in n Δ t time before statistics current time, generate and measure ature of coal nature γ radiation feature coding, the feature coding of INTELLIGENT IDENTIFICATION algorithm to known coal of coal quality identification system (10) inside combines, and compare with actual measurement feature coding, until minimize nature γ radiation spectral characteristics vector output bias, identification draws the mixing proportion α of each typical coal
i, accordingly with reference to the thermal value of each coal sample, volatile matter, ash content and moisture, according to the mixing thermal value of the tested fire coal of component weighted average calculation, volatile matter, ash content and moisture, the control system of electric power supply plant uses.
2. on-line monitoring system according to claim 1, is characterized in that: described naturalγ-rayenergyspectrum measuring sonde (4) is made up of low potassium NaI crystal and photomultiplier, is installed on coal-fired transfer passage.
3. the on-line monitoring method using the on-line monitoring system described in claim 1 or 2 to carry out, it is characterized in that: by measure in real time coal natural γ radiation feature and according to ature of coal and natural γ radiation feature Sample Storehouse, identification as-fired coal kind and component thereof, calculate ature of coal parameter.
4. on-line monitoring method according to claim 3, it is characterized in that: described natural γ radiation feature by measuring in real time coal according to ature of coal and natural γ radiation feature Sample Storehouse, identification as-fired coal kind and component thereof, the concrete grammar calculating ature of coal parameter is: first, the naturalγ-rayenergyspectrum measuring sonde (4) that the part gamma-rays that in the coal (2) of conveying in coal dust transfer passage (1), contained by ash content, radioelement is constantly released is installed on channel side wall absorbs, be converted to after electric signal delivers to signal amplifier (5) amplification and deliver to electric pulse analytic system (7), meanwhile, spectrum stabilization control system (6) is by being installed on the inner temperature sensor of naturalγ-rayenergyspectrum measuring sonde (4), obtain temperature signal, the temperature correction curve amplification coefficient to naturalγ-rayenergyspectrum measuring sonde (4) built-in according to spectrum stabilization control system (6) carries out coarse adjustment, and carry out fine tuning according to typical radioactive element characteristic energy, ensure the output accuracy of naturalγ-rayenergyspectrum measuring sonde (4), subsequently, electric pulse analytic system (7) is according to the multiple energy windows arranged, the pulse of the corresponding energy received is counted, and carry out the preservation of count results with the Δ t time for the cycle and pass to coal quality identification system (10), subsequently, coal quality identification system (10) with the Δ t time for the cycle, the count results of each energy window in n Δ t time before statistics current time, generate and measure ature of coal nature γ radiation feature coding, the feature coding of INTELLIGENT IDENTIFICATION algorithm to known coal of coal quality identification system (10) inside combines, and compare with actual measurement feature coding, until minimize nature γ radiation spectral characteristics vector output bias, identification draws the mixing proportion α of each typical coal
i, accordingly with reference to the thermal value of each coal sample, volatile matter, ash content and moisture, according to the mixing thermal value of the tested fire coal of component weighted average calculation, volatile matter, ash content and moisture, the control system of electric power supply plant uses.
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| CN104569021A (en) * | 2015-01-20 | 2015-04-29 | 西安阿尔特测控技术有限公司 | Passive coal ash content measurement device and method |
| CN104699064B (en) * | 2015-03-20 | 2017-03-08 | 东南大学 | A kind of ature of coal self-tuning model method of fired power generating unit coordinated control system |
| CN105823863A (en) * | 2016-03-28 | 2016-08-03 | 华北电力大学（保定） | Coal quality on-line industrial analysis and measurement method based on constant temperature thermogravimetric analysis |
| CN109142430A (en) * | 2017-06-27 | 2019-01-04 | 邸生才 | Wind is delivered coal powder calorific capacity surveying instrument and its measurement method |
| CN109211964A (en) * | 2017-07-05 | 2019-01-15 | 邸生才 | Wind is delivered coal powder calorific value on-line measurement instrument and its measurement method |
| CN111999775B (en) * | 2020-08-06 | 2024-03-01 | 中国石油天然气集团有限公司 | Method for processing coincidence measurement energy spectrum |
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| GB2039363B (en) * | 1979-01-12 | 1983-02-16 | Coal Ind | Determining the nature of transported material |
| CN100595575C (en) * | 2007-11-19 | 2010-03-24 | 南京国晟科技有限公司 | Diffuse transmission type composition of ores real time on-line testing apparatus |
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